3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
15,3 3,5,3
27 3,9 3,3,3
9x9=81. Proving that one of the factor trees for 81 is 9xp.
728 13 x 56 13 x (7x8) 13 x (7 x (2x4)) 13 x (7 x (2 x (2x2))) Since 2, 7, and 13 are prime numbers, the factor tree is complete.
426,72,3,7
Factor tree for 49:49/ \7 x 7497,7
133 7 x 19 Both 7 and 19 are prime numbers, so the factor tree is complete.
As a product of its prime factors: 3*5*7 = 105
The factor tree is as follows: 114 57,2 19,3,2
no
39 3,13
7 is prime. No tree. On the off chance you meant 72... 72 2,36 2,2,18 2,2,2,9 2,2,2,3,3
3*3*7
21/ \7 3
14 2, 7
No.